If you have Ver 4.0 or high (see the version number printed on the back of your device, download below apk to change parameter such as Mic and speaker volume

cell2jack_utility_600.apk | |
File Size: | 1622 kb |
File Type: | apk |
cell2jack_utility_600.apk | |
File Size: | 1622 kb |
File Type: | apk |